A recent report published in USA Today indicated that a common family of four spends $ 490 a month on food. Suppose the distribution of food expenses for a family of four follows a symmetric distribution, with an average dispersion of $ 90. Based on the information obtained, we want to identify: what percentage of families spends: more than $ 30 and less than $ 490 in food per month; less than less than $ 430 a month in food; between $ 430 and $ 600 per month in food; between $ 500 and $ 600 per month in food; and less than $ 410 or more than 570 per month in food. Use all the tools learned in the course and carry out the analysis required for the study detailing an individual sentence of interpretation for each situation.
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